Very nice Zuma clone.
By the way - stealing would be if someone takes someone elses game and says it is his. This one is a clone - something that is very well known in the industry.
You got the basics down, now make it a nice game! You need artistic help, balance the towers, more (at least visually) different enemies, a visual indicator for the upgrade status of a tower.
At the moment as soon as you start placing flamethrowers (?) the game is over - no enemy can pass a thrower group.
A timer instead of the nuke/nextwave button would be nice, also some kind of speedup.
Check out some of the simpler TD games on the site for ideas. Plagiarism is the greatest form of flattery ;)
4/5 for effort.
Nice one for a first, clean and straight. Ship needs more coloring. Maybe add scoring depending on y-coordinate (the higher up, the more dangerous, the more points). Also some more different asteroids and maybe some kind of powerup and/or accuracy measure.
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